I suppose we will have to use our sets of anecdotal evidence and agree to disagree.
I can't argue that police reform is unnecessary because it is. Despite that face I don't think you can say that police aren't also making DUI arrests, responding to neighborhood disturbances, providing safety and first response for incidents on the road, and other non-state enforcing sorts of issues. Public perspective is important, but I think the ACAB crowd would also be inclined to tell you that anarchists are fundamentally dangerous, animal rights protesters are disruptive and misguided, and a bunch of other stuff that is "valid opinion" but is hardly accurate or well considered.
I would contend that ANY policing or militia unit will eventually come to be an enforcer of private "property relations" to a greater or lesser extent for any society that permits the accumulation of wealth or value, but that's not the fault of the rule enforcing groups. Someone has to keep the peace. (Maybe here's your whole political point idk).
The last thing I'll say is
Not if the militia is delegated by the community. The community wont order its' militia by consensus to beat up part of the community.
This is bogus. Little towns in middle America do exactly this. Progressivism vs conservativism here near the birthplace of the KKK is not a quiet and harmonious affair as signs, graffiti, and even open displays of aggression show. People are nasty and people are good, but there are both types for sure.
I don't think any of your principles in this thread are wrong per se, but I'm not seeing how they scale beyond a small town.